Yeah but Macs have their own proprietary thing going on. I'm talking about folks who build their own rigs. You don't see that everyday, especially on a high end card. But I agree, that Mac video card is funky looking too, how the heatsink is positioned.
In my opinion $429 is still kinda high. Looking at nvidia's 500 series there is a big price difference between their 570 and 580 almost $200. But I guess they gotta make their money somewhere.